The archive names that you require are:
Irchat /pub/aminet/comm/tcp/irchat24.lha Grapevine /pub/aminet/comm/net/grapevine.lha
Although, until recently, I have remained blissfully unaware of its existence, I have unfortunately been forced to find out about the Usenet Commodore Trivia Competition (now staggeringly on its 19th incarnation). With a first prize of "The Amiga/Toaster Reference Manual (worth $34.95)", this is the competition for you if you can answer questions such as the pertinent "On the Commodore 64, what area of memory is swapped when using an REU with RamDOS?", or the incisive "How many LEDs are on the KIM-1". If this sounds like the sort of thing you couldn't do without, check out the hot action in comp.sys.amiga.advocacy.